Abstract: The subject of the study is the main approaches to determining the system of dynamic and temporal relationships of road traffic crimes included in the mechanism of road traffic crimes, its content and structure, as well as the law enforcement practice of investigating this category of criminal cases. The purpose of the study is to clarify and substantiate the substantive elements of the mechanism of traffic crimes and to define its concept. The author substantiates the idea that knowledge and understanding of the system of dynamic and temporal relationships of road traffic crimes helps law enforcement officers at the initial stage of the investigation to find out which objects interacted with each other during the commission of criminal acts, to form versions as to the condition and properties of these objects carried out contact interaction. The methodological basis of the study is: the method of critical analysis (the analysis of various points of view of the authors on the concept of "mechanism of road traffic crimes" was carried out and elements of the mechanism of road traffic crimes were identified), the method of legal modeling (a variant of the structural construction of the mechanism of road traffic crimes was proposed, the formulation of the concept of "mechanism of road traffic crimes" was carried out). The author summarizes new material on the topic under study: official statistics data for 2022 and six months of 2023, research by domestic authors from 1999 to 2023, and also uses the author's experience in investigating traffic crimes as an investigator of internal affairs bodies. The author analyzes the available points of view in the forensic literature and proposes a definition of the mechanism of traffic crimes, as well as its possible content and structure. The author comes to the conclusion that the mechanism of traffic crimes is a system of dynamic and temporal relationships, the main elements of which are: 1) the driver; 2) the vehicle; 3) various types of road situations, including information about road conditions and the environment in each form – from the initial to the culmination.